Procolored L1800 DTF Printer: Ink Tube Replacement, Pump Compatibility, White Ink Issues & Maintenance Guide

Question:
I have a Procolored L1800 printer and want to replace several components, including ink tubes, ink sacs, air filters on the tanks, the peristaltic pump, and the white ink tank mixer. I'd also like to know what type of grease to use for the carriage bar. Additionally, I'm having ongoing issues with white ink and want to know the best white ink to use. I previously purchased a new printhead in October 2025.

Answer:
1. Ink Tubes (C2 vs. C3)

Most Epson-based DTF systems, including L1800 conversions like Procolored units, typically use:

• C2 tubing for color inks (CMYK)

• C3 tubing for white ink

C3 tubing has a slightly larger inner diameter, which helps reduce clogging and improves flow for thicker white ink. However, using C2 tubing for white ink is acceptable, especially if your system was originally designed that way. The key is consistency-mixing tubing sizes improperly can lead to uneven ink delivery or pressure issues.

2. Ink Sacs and Air Filters

• Ink sacs (dampers): Make sure they are compatible with Epson L1800 printheads. For DTF, you want dampers designed to handle pigment-based inks, especially white.

• Air filters: These are critical for maintaining proper pressure balance in your ink tanks. If clogged, they can cause ink starvation or inconsistent flow-particularly problematic for white ink.

Replacing both periodically is a good maintenance practice, especially if you're already experiencing white ink issues.

3. Peristaltic Pump Replacement

For your pump, compatibility comes down to a few key factors:

• Voltage: Most systems use 24V pumps

• Type: Either peristaltic or diaphragm (must match your original setup)

As long as you match these two parameters, the pump should function correctly for printing purposes. While there are additional specifications like flow rate and tubing diameter, these are usually standardized in DTF systems and not critical unless you're modifying the system.

4. White Ink Tank Mixer

White ink requires constant agitation because titanium dioxide settles quickly. If your mixer is failing or weak, you'll see:

• Frequent clogging

• Inconsistent white output

• Sediment buildup in lines and dampers

Make sure the replacement mixer matches your tank size and voltage. A properly functioning mixer is essential for maintaining printhead health-especially since you replaced your printhead recently.

5. Lubrication for the Carriage Bar

For the carriage rail (guide bar), use:

• Light synthetic grease or

• White lithium grease (sparingly applied)

Avoid heavy grease or oil that can attract dust. Apply a thin layer and wipe off excess. Proper lubrication ensures smooth carriage movement and reduces strain on the motor and belt.

6. White Ink Issues (Common Causes)

White ink is the most problematic part of any DTF system. Since you mentioned ongoing issues-even after replacing the printhead-here are the most likely causes:

• Clogging due to sedimentation (insufficient mixing)

• Air entering the system (bad dampers, loose connections, or clogged filters)

• Inconsistent flow from tubing or pump

• Ink quality or storage issues

Unlike CMYK inks, white ink requires daily circulation and regular maintenance. Even a small lapse can lead to clogs.

7. Best White Ink Recommendation

We understand the importance of choosing the right ink. However, we only have direct experience with our own formulations and cannot reliably compare or recommend other brands. The most important factors when selecting white ink are:

• Consistent particle suspension

• Compatibility with Epson-based printheads

• Reliable supplier with batch consistency

If you continue experiencing issues, it may be worth evaluating whether your current ink supplier is providing consistent quality.

Additional Notes on Printhead Longevity

Since you replaced your printhead in October 2025, protecting it should be a priority. White ink systems are the leading cause of premature printhead failure. Ensuring proper flow, filtration, and agitation will significantly extend its lifespan.

Addressing printer issues can be a complicated and hands-on process. Unfortunately, we're not able to provide remote troubleshooting, repair guidance, or step-by-step technical support. However, we do offer in-person evaluation and repair services through our local diagnostic facility. You can learn more here: printer repair service (https://bchtechnologies.com/printer-repair-service).

Due to high demand, we operate on a first-come, first-served basis, and it may take a few weeks before we can accept new drop-offs. Our services cover both full printer repairs and individual component work, with clear instructions provided. That said, we understand our services may not be the most budget-friendly, so we strongly encourage self-guided research.

A great place to start is YouTube, including our channel homepage here: BCH Technologies YouTube Channel (https://youtube.com/@bchtechnologies). Use the search icon next to the "About" section to find specific topics. With hundreds of videos created over the past nine years, this is the fastest way to locate relevant content. You may also discover helpful videos from other creators.

Thanks again for reaching out and for your continued support. We truly appreciate your trust in BCH Technologies, and we're always here to help guide you in the right direction.